#3738B0#3738B0
#3738B0 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.4% C 0.185 H 274.8°. Best body text is #FFFFFF at 8.92:1 contrast (WCAG AA passes).
Color values
| HEX | #3738B0 |
|---|---|
| RGB | rgb(55, 56, 176) |
| HSL | hsl(240, 52%, 45%) |
| HSV | hsv(240, 69%, 69%) |
| CMYK | cmyk(68.8%, 68.2%, 0%, 31%) |
| CIE-LAB | lab(31.29, 38.53, -63.83) |
| CIE-LCH | lch(31.29, 74.56, 301.12°) |
| OKLab | oklab(42.37% 0.0153 -0.1844) |
| OKLCH | oklch(42.37% 0.185 274.8) |
| XYZ | xyz(10.8236, 6.7742, 41.8030) |
| Luminance | 0.0678 (WCAG relative) |
| Temperature | cool |
| Family | blue |
Closest named colors
Sapphire (survey)
#2138AB
ΔE00 2.52
Ocean Blue
#4F42B5
ΔE00 4.01
Blue Blue
#2242C7
ΔE00 4.47
Blue With A Hint Of Purple
#533CC6
ΔE00 5.01
Blueberry
#464196
ΔE00 5.29
Blurple
#5539CC
ΔE00 5.70
Perceptual scales
Shades
Tints
Tones
OKLCH scale
Color harmonies
complementary
#3738B0 #B0AF37
analogous
#3774B0 #3738B0 #7237B0
triadic
#3738B0 #B03738 #38B037
tetradic
#3738B0 #B03774 #B0AF37 #37B072
square
#3738B0 #B03774 #B0AF37 #37B072
split-complementary
#3738B0 #B07237 #74B037
monochromatic
#1A1A53 #282981 #3738B0 #595ACB #8888DA
Accessibility & contrast
On white
8.92
#3738B0 on #FFFFFF
AA ✓AA large ✓AAA ✓
On black
2.36
#3738B0 on #000000
AA ✗AA large ✗AAA ✗
Best text color
#FFFFFF on #3738B0
8.92:1 — WCAG AA (normal text) passes
Contrast matrix
| fg \ bg | ##3738B0 | #FFFFFF | #000000 | ##FFFFFF |
|---|---|---|---|---|
| ##3738B0 | 1.00 | 8.92 | 2.36 | 8.92 |
| #FFFFFF | 8.92 | 1.00 | 21.00 | 1.00 |
| #000000 | 2.36 | 21.00 | 1.00 | 21.00 |
| ##FFFFFF | 8.92 | 1.00 | 21.00 | 1.00 |
Color blindness preview
Protanopia (red-blind)
#004FB4
Deuteranopia (green-blind)
#0044AE
Tritanopia (blue-blind)
#00586F
Achromatopsia (no color)
#4A4A4A
Design tokens & code
CSS
--color: #3738b0; /* rgb */ color: rgb(55, 56, 176); /* oklch */ color: oklch(42.4% 0.185 274.8);
Tailwind
colors: {
custom: {
50: '#7e6fc9',
500: '#3738b0',
950: '#000000',
},
}SCSS
$custom: #3738b0; $custom-light: #7e6fc9; $custom-dark: #000000;
JSON
{
"hex": "#3738b0",
"rgb": {
"r": 55,
"g": 56,
"b": 176
},
"hsl": {
"h": 239.504,
"s": 52.381,
"l": 45.294
},
"oklch": {
"l": 0.42366,
"c": 0.18501,
"h": 274.8
},
"luminance": 0.06775
}Semantic roles & 50–950 ramp
primary
#3738B0
secondary
#C4C37F
accent
#DB4CDC
background
#F8F6FC
surface
#EFECF8
border
#CAC7D1
text
#0B0713
muted
#7C7A82